'use strict';

const semver = require('semver')
const colors = require('colors')
const log = require('@hedait-cli/log')
// const {isObject} = require("@hedait-cli/utils")

const LOWEST_NODE_VERSION = '12.0.0'

class Command {
    constructor(argv) {
        // log.verbose('Command constructor', argv)
        if(!argv) {
            throw new Error('参数不能为空')
        }
        if(!Array.isArray(argv)) {
            throw new Error('参数必须为数组')
        }
        if(argv.length < 1) {
            throw new Error('参数列表为空')
        }
        this._argv = argv
        let runner = new Promise((resolve, reject) => {
            let chain = Promise.resolve()
            chain = chain.then(() => this.checkNodeVersion())
            chain = chain.then(() => this.initArgs())
            chain = chain.then(() => this.init())
            chain = chain.then(() => this.exec())
            chain.catch(err => {
                log.error(err.message)
            })
        })
    }

    initArgs() {
        this._cmd = this._argv[this._argv.length - 1]
        this._argv = this._argv.slice(0, this._argv.length - 1)
    }

    // 最低版本号检查
    checkNodeVersion() {
        // 获取当前Node版本号
        const currentVersion = process.version
        // 比对最低版本号
        const lowestVersion = LOWEST_NODE_VERSION
        if (!semver.gte(currentVersion, lowestVersion)) {
            throw new Error(colors.red(`hedait-cli 需要安装 v${lowestVersion} 以上版本的Node.js`))
        }
    }

    init() {
        throw new Error('init必须实现')
    }

    exec() {
        throw new Error('exec必须实现')
    }
}

module.exports = Command;
